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How to prevent clogging of filter cloth

Time : 2023-06-28 Hits : 3

How to prevent clogging of filter cloth The vacuum belt dehydrator is an important equipment for the secondary dehydration of gypsum. The quality of filter cloth determines the dehydration effect of the filter. The service life of filter cloth is determined by many factors such as the type, performance, working condition and temperature of the treated material. However, in the process of using the filter cloth, clogging often occurs, which will seriously affect the filtering effect of the filter cloth. Some power plants are not started 24 hours a day and may be shut down. In this case, if the filter cloth is not cleaned in time during shutdown, gypsum will scale on the surface of the filter cloth and silt up the gaps on the surface of the filter cloth, which will be difficult to clean in future use, thus shortening the service life of the filter cloth and affecting the filtering effect. Therefore, when the filter is stopped, the residual gypsum on the surface of the filter cloth must be cleaned first. Keep the filter cloth surface clean. Generally, the filter cloth needs to be replaced after a period of use, because the filter cloth will be deformed and shrunk after a period of normal use; In addition, the impurities of the treated materials remain in the filter cloth and cannot be washed away. Although the filter cloth is not damaged, it has seriously affected the filtering effect. The content of acid insoluble substances in the gypsum slurry from the cyclone exceeds the standard, which will also block the filter cloth. There are three main sources of acid insoluble substances: 1. The content of acid insoluble substances in limestone powder exceeds the standard, such as carbides, heavy metal ions, alumina, insoluble silicates, alumina, clay and other refractory materials 2. The ionic impurities insoluble in acid in the process water used exceed the standard. Some process water in power plants is recycled, which directly causes the high content of acid insoluble substances in the process water, thus causing the acid insoluble substances in the slurry to seriously exceed the standard and blocking the filter cloth. 3. The impurities in the flue gas dedusting process are too high, especially the electric dedusting, which contains high impurities. Therefore, it is recommended that the power plant use cloth bag dedusting. Prev:

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